Certainly! You can watch a talk about the operations behind the Home Computer Museum here: https://media.ccc.de/v/mch2022-140-homecomputermuseum-the-ma...

There's also a page here that contains the budget for multiple years, although the totals from 2027 on don't sum correctly from the different sub-budgets: https://www.homecomputermuseum.nl/informatie/organisatie/bel...

Apart from entrance fees and relying on volunteers, the Home Computer Museum will repair your old home computer for money. If they have a lot of the same type of computer, they also sell them, as well as old monitors and other devices.